Tantrum
While it's fun to have a tantrum and storm out of Facebook it doesn't really make sense. Facebook is whatever you make of it. If you share your innermost thoughts then it will know about them. If you get your news by reading suggested articles from Facebook then you will give them the power to shape your opinions.
Just don't do those things. Follow the old rule of "Don't put anything on the internet which you don't want in a newspaper, regardless of what the privacy settings claim to be" and get your news from somewhere trustworthy.
Use facebook as an address book and a way to keep in touch with people you see face-to-face as often as you'd like to. Delete the old school friends who you don't really want to see anyway.